resideo S8910U Installation Instructions Manual

S8910U Universal Hot Surface
Ignition Module
Installation Instructions for the Trained Service
Technician.
APPLICATION
The S8910U Universal Hot Surface Ignition Module is
designed to provide easy field replacement for a wide
range of hot surface ignition modules manufactured by
Resideo, Robertshaw and White-Rodgers. The S8910U
Module provides operating control of a direct ignition
system using a 120 Vac hot surface igniter. The S8910U
replaces existing flame rectification type hot surface
ignition modules with the following characteristics:
• 120 Vac (up to 5A) timed warmup hot surface ignition
elements.
• Single rod (local sense) or dual rod (remote sense)
hot surface ignition.
• One or three ignition trials per call for heat.
• Four-second or seven-second ignition trials.
• Prepurge of 32 seconds or less.
• Up to 96 seconds between trial purge times (three-
trial mode only).
• Natural or LP gas.
The S8910U is not designed to replace:
• Intermittent pilot ignition controls.
• Direct spark ignition controls.
• Proven 120 Vac hot surface ignition controls.
• 24 Vac element hot surface ignition controls.
• 240 Vac input/120 Vac element hot surface ignition
controls.
• 120 Vac timed warmup hot surface ignition controls
with:
— Ignition trial time shorter than four seconds.
— Ignition trial time longer than twelve seconds.
— Edge connectors rather than male quick-con-
nects.
The S8910U package contains the S8910U control, and
easy-to-use instructions, and the accessories required
to adapt the existing hot surface ignition module. The
accessory bag assembly includes the White-Rodgers
adapter, Robertshaw ground lead, four 1/4 in. female
.032 quick-connects, one 3/16 in. female .032 quick-
connect, four selection tabs and seven wire labels. The
wiring labels are included to assure proper marking of
the wires attached to the existing module.
A complete list of the specific Resideo and other
modules that the S8910U is designed to replace is
provided in Table 1 through 3.
INSTALLATION INSTRUCTIONS
NOTE: The S8910U is intended to replace only defec-
tive ignition controls. The service technician
should make sure that the other parts of the
appliance and control system operate safely
and reliably before replacing the ignition con-
trol.
WARNING
EXPLOSION HAZARD. CAN CAUSE INJURY OR
EQUIPMENT DAMAGE.
The S8910U can only be used for direct replace-
ment. Check Table 1 through 3 before replacing
an existing hot surface module with the S8910U.
If the existing module is not listed, do not use the
S8910U to replace it. Always use the selection
tab specified in Table 1 through 3 for the existing
module being replaced. Replacing with an
unlisted module or using a selection tab not
specified can result in appliance malfunction.
Electrical Ratings:
Control Voltage: 24V, 60 Hz.
Maximum Valve Contact Rating: 2A. Current Draw:
.4A plus valve load.
Hot Surface Igniter Voltage: 120 Vac, 60 Hz. Contact
Rating At 120 Vac: 5A.
IMPORTANT
Use the S8910U only in a 60 Hz system. Be
sure the system is not 50 Hz.
Hot Surface Igniter or Igniter-Sensor:
Norton Model 201 or 271 or equivalent.
NOTE: If an igniter other than a Norton Model 201 or
271is used, the igniter must meet the following
minimum specifications required over the life
of the igniter:
— Igniter must reach 1832 °F (1000 °C) within
34 seconds with 102 Vac applied.
— Igniter must maintain at least 500M ohms
insulation resistance between the igniter
leadwires and the igniter mounting bracket.
— Igniter must not develop an insulating layer
on its surface (over time) that would prevent
flame sensing.
— Igniter surface area immersed in flame must
not exceed one-fourth of the grounded area
immersed in flame. This would prevent
flame sensing.
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